Feed-out mechanism



B. F. MADSEN ETAL FEED-OUT MECHANISM Filed Jan. 2'7, 1!.956

Sept. 9, 1958 mvENTohs BERTHEL F. MADSEN JOHN E. RANDOLPH ATTORNEYUnited States Patent FEED-OUT MECHANISM Berthel F. Madsen, ArlingtonHeights, and John E. Randolph, Chicago, 111., assignors to TeletypeCorporation, Chicago, 111., a corporation of Delaware ApplicationJanuary 27, 1956, Serial No. 561,724

6 Claims. (Cl. 197-133) The present invention pertains to an improvementin a telegraph page printer and more particularly to a form feed-outmechanism for a page printer of the type described in the United StatesPatent No. 2,505,729 issued to Mr. W. J. Zenner on April 25, 1950.

One object of the present invention is to provide a telegraph printerwith a form feed-out device which operates independently of the linefeed mechanism of the printer.

Another object of the present invention is to provide a telegraphprinter with an auxiliary motor for advancing a platen through apredetermined amount of advance.

These and other objects will be apparent from the following descriptionwhen it is considered in conjunction with the drawings wherein:

Fig. 1 is an end view of a printer embodying the present invention withthe electromagnet removed; and

Fig. 2 is an enlarged perspective showing the switch actuating and linefeed disconnecting device in detail with the electromagnet in place.

The present invention accomplishes the rapid, uninterrupted feed-out ofthe record by employing a small, high speed, low inertia motor to drivethe platen through a toothed belt drive. The signal controlled mechanismfor disengaging the normal line feed and energizing the form feed-outmotor is activated by an electromagnet.

Referring now to Fig. 1, a platen 11 has a line feed gear 12 keyed toits shaft so as to be rotatable by the line feed pawls 13 in a manner tobe described. A second gear 14 is similarly keyed to the platen shaftand is adapted to drive or be driven by a belt 16 which connects thegear 14 with an idler gear 17. Keyed to the same shaft as the gear 17 isa second idler gear 18 which is engaged to be driven by the output gear19 on an electric motor 21. The idler gear 18 is engaged with a programwheel 22 so that the program wheel 22 is advanced proportionately to theadvance of idler gear 18 and hence proportionately to the advance of theplaten.

The motor 21 is electrically connected to a microswitch 23, which is inturn controlled by the feedout assembly 24.

The line feed pawls 13 are mounted on eccentrics 26 so as to bealternately moved into engagement with the gear 12 and downward toimpart rotation to the platen 11. The eccentrics 26 are driven through aline feed clutch (not shown) which is tripped by the line feed signal toadvance the platen one line.

A lever 27 is pivotally attached to the frame at a point 28 and isadapted to be constantly oscillated by any convenient means such as thetype box clutch (not shown). An interponent 29, pivotally fastened onthe lever 27, connects the lever 27 with a slide bar operating blade 31which is constantly oscillated about its pivot point 32.

The feed-out assembly 24 which is most clearly illustrated in Fig. 2 iscomprised of an operating bar, or

"2,851,142 Patented Sept. 9, 1958 slide bar 33 slidably mounted on theframe, a pawl 34 mounted on the frame at 30 and articulated to a pin 36which is mounted in a pair of elongated holes in the line feed pawls 13,a program pawl 37 pivotally mounted on the frame at pin 48, which pinalso has the bifurcated portion 38 of the operating 'bar 33 slidablymounted thereon, a hinged blocking member 39 secured to the bar 33 so asto be cooperable with the bar operating blade 31, an electromagnet 41,an armature 42 associated with the magnet 41 and articulated to thehinged member 39, and the microswitch 23 so positioned asv to beoperable by the leftward movement of the operating bar 33.

In operation, the lever 27 is constantly oscillated by an eccentric camon the type box clutch which is not shown but is described in theaforementioned Zenner patent, said patent being a part hereof byreference. Oscillation of the lever 27 imparts an oscillatory movementto the operating blade 31 through the interponent 29. When theelectromagnet 41 is not energized, its armature 42 is moved toward theoperating bar 33 by the spring 43 to thereby pivot the hinged member 39clockwise out of the path of the operating blade 31. When the feed-outsignal is received, the magnet 41 is energized in the well known mannerto draw up the armature 42 and thereby rotate the hinged member 39 intothe path of the operating blade 31. As the blade 31 is oscillatedcounterclockwise, it strikes the hinged member 39 and carries it to theleft thereby moving the operating bar 33 to the left against the urgingof its spring 46. At the end of the counterclockwise oscillation of theblade 31, the shoulder 44 of the bar 33 cooperates with the latch plate35 to hold the operating bar 33 in its leftward position. The leftwardmovement of the bar 33 moves the lower extension of its bifurcatedportion 38 against the switch 23 to energize the motor 21 andsimultaneously moves the line feed pawls 13 out of engagement with theplaten gear 12 by moving the .pawl 34 to the left against the urging ofthe spring 47.

The pawl 341s pivotally attached at 30 and the pin 36 so that thespacing pawls 13 are rotated counterclockwise out of engagement with thegear 12. The motor 21 operates to drive the gears 17 and 18 which inturn drive the platen 11 and the program wheel 22. After the platen 11has been rotated a predetermined amount, the program wheel will havebeen rotated until a selectively attached cam blade 25 contacts thetripping pawl 37 and rotates it counterclockwise about the pin 48 tomove the tripping pawl extension 49 against the bar 33 to disengage theshoulder 44 from the latching plate 35 so as to allow the bar 33 to bereturned to its unoperated position by its spring 46. Returning of thebar 33, of course, reverses the operating procedure so that the switch23 de-energizes the motor 21 and the pawls 13 are once more engaged withthe platen gear 12. While only one cam blade 25 is shown on the programwheel 22, it should be understood that as many cam blades as areconvenient may be employed with the present invention.

While the present invention has been illustrated in a specificembodiment, it is of course understood that the invention may be used inother embodiments without departing from the spirit and scope thereof.

What is claimed is:

1. In a telegraph printer, a platen, an eccentrically mounted feed pawlmeans normally engaged for selectively advancing said platen, a powermeans independent of the printer operable to rotate said platen, aswitch for actuating said power means, a slide bar articulated to saidfeed pawl means, said bar being operable to simultaneously disengagesaid feed pawl means and actuate: said switch; a constantlyoscillating-lever" driven by the printer; an electromagnet, an armaturemeans controlled'by saidmagnet for conditioning said 'slide bar foroperation by said oscillating lever, means for selectively energizingsaidmagnet, latching means for bolding said slide baroperated and meansactuated'by, the advance of said platen .to a predetermined point forrendering said latching, means ineffective.

2. In a telegraphprinter, a platen, a gear operable to rotate saidplaten, a pair of eccentrically mounted pawls normally engaged with saidgear, a first power means for selectively operatingsaid gear throughsaid pawls, a second power means for rotating said platen, meansarticulated to said' pawls for disengaging said pawls from said'gear,means controlled by the operation of said disengaging meansvforactuatingsaid sec,- ond power means, means for operating saiddisengaging means operated, a program wheel adapted to be rotatedinproportion to the rotation of'saidlplaten, and means controlled by apredeterminedamount offprogram wheel rotation for rendering saidlatching means ineffective.

3. In combination in a motor powered recorder, a rotatable platen, afirst gear keyed to said platen, a second gear keyed to said platen, apair of line feed pawls' engaged with said first gear, means forselectively operating said pawl's by the recorder motor, power meansengaged with said second gearfor advancing said platen, said power meansbeing, independent of the recorder motor, a switch adapted to operatesaid power means, an operating bar adapted to actuate said switcharticulated to' said "line feed pawls, a constantly oscillating, leveradaptable to move said operating bar intocontact with'said' switch, and'a means for engaging said lever with said operating bar, whereby saidpawls are disengage'dfrom said first gear simultaneously with theactuation of said power means.

4. In a telegraph recorder which includes a platen, a gear keyed to theplaten, line feed means normally engaged with said gear, and a programwheel adapted to be rotated by said'platen, an auxiliaryfeed-out'mechanism comprising, an electric motor means operable torotate said platen, a power source including a switch for actuatingsaidmotor, a slide-bar operable to actuate said switch, resilient meansfor holding, said slide bar unoperated, means controlled by theoperation of said 42: slide" bar for disengaging-said line feed means,apawl pivotally mounted on said slide bar, a constantly moving operatingmeans, an electromagnet, an armature means operable by said magnet topivot said pawl into the path of said operating means, whereby saidslide bar is moved to its operated position, means for selectivelyenergizing said magnet, means for latching said slide bar in itsoperated position, and unlatching means controlled by said programwheel;

for. conditioningnsaidl slide bar for operation by said oscillatinglever, means for. selectively energizing, said.

magnet; latching means for. holding said slide bar opcrated, and meansactuated by the rotation of said platen to a predetermined point; forrendering said latching means ineifect ive.

6'. 111-8. telegraphprinter, a platen, a first means controlled by theprinter and normally engaged to:rotate:

said platen, a secondmeans independent of said printer and operable torotate said platen, a power source, a switch for connectingrsaid secondmeans to said, power source to actuate said second means, a slide bararticulated to said first means. and operable to simultaneouslydisengage said first means and actuate saidswitch, aconstantlyoscillating, lever driven by said printer, means for causing operationof said slide bar bysaid oscillating,

lever, latchingmeans for holding said slide bar operated, and meansactuated by the rotation of said platen to a predetermined point forrendering said latching means ineffective.

References Citcd'in the file of this patent UNITED STATES PATENTS1,252,845 Roberts Jan. 8, 1918 2,251,147 Mann July 29, 1941 2,667,256Madsen Jan. 26, 1954 (SEAL) UNITED STATES PATENT OFFICE CERTIFICATE OFCORRECTION Patent No. 2,851,142 September 9, 1958 Berthel F. Madsen, eta1.

It is hereb$r certified that error appears in the-printed specificationof the above numbered patent requiring correction and that the saidLetters Patent should read as corrected below.

Column 3, line 18, after "means" insert latching means for holding saiddisengaging means Signed and sealed this 12th day of May 1959.

Attest:

KARL H AXLINE ROBERT C. WATSON Attesting Oflicer Commissioner of Patents

